【文档说明】《Unit 7 What’s the highest mountain in the world Section A》PPT课件6-八年级下册新目标英语【人教版】.ppt，共(57)页，953.000 KB，由小喜鸽上传

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Unit7What’sthehighestmountainintheworld?GrammarFocusWhat'sthehighestmountainintheworld?Qomolangma.HowhighisQomolangma?It's8,844.43met

ershigh.It'shigherthananyothermountain.Whichisthedeepestsaltlakeintheworld?TheCaspianSeaisthedeepestofallthesaltlakes.Didyouknow

thatChinaisoneoftheoldestcountriesintheworld?Yes,Idid.It'smucholderthantheUS.4a.Fillintheblankswiththecorrectformsofthewordsinthebox.1.TheAmazonR

iverisoneofthe_________riversintheworld.It’salittle________thantheYangtzeRiver.2.Qomolangmais8,844.43meters_______.bigmuchpopularlongoldhighlongest

longerhighIt’soneofthemost__________placesforseriousmountainclimbers.3.Nooceanintheworldisas________a

sthePacificOcean.4.AlthoughJapanis__________thanCanada,itis_________smaller.popularbigoldermuche.g.Tworivers：_________________and____

_________________________________________________________________________________________________________________________

___________________4b.Writetwocomparisonsabouttwotopics.Writetruefacts.theYangtzeRivertheAmazonRiverTheYangtz

eRiverisalmostaslongastheAmazonRiver.TheAmazonislongerthantheYangtze,buttheYangtzeisthelongestriverinChina.Twoc

ities：__________and__________1.______________________________________2._____________________________________________________________________

______Twoanimals：__________and__________1.______________________________________2.___________________________________________

________________________________4c.Writefivequestionsusingcomparisons.Thenaskyourpartneryourquestions.1.___________________

_________________2.____________________________________3.____________________________________4._______________

_____________________5.____________________________________Whatisthehighestbuildinginourcity?Whoistheoldestpeople

inourcity?Whatisthemostpopularstreetinourcity?Whatisthemostdeliciousfoodinourcity?Whereisthebusiestroadinourcity?GrammarFocus(一)数词Nu

meral数词是用来表示事物的数目和顺序的词。数词的分类：1.基数词2.序数词3.分数词今天我们先来学习一下基数词。1.复习1—100以内的所有数字。2.掌握百、千、万、十万、百万的表达法。1、1-19的基数词one1two2three3four4

five5six6seven7eight8nine9ten10eleven11twelve12thirteen13fourteen14fifteen15sixteen16seventeen17eighteen18nineteen192、20—90等十位数twenty20thirt

y30forty40fifty50sixty60seventy70eighty80ninety90twenty-one21twenty-two22………………其它的十位数照此类推，如：thirty-one31forty-two42seventy-five75ninety-s

ix963、百、千、万百hundred100onehundred200twohundred以此类推····千thousand1000onethousand2000twothousand·········英语里没有“万”这一单位，万也用thousand表示

。如：10000tenthousand一万20000twentythousand两万·····4、十万、百万十万的说法是：100.000a(one)hundredthousand200.000twohundredthousandmillion百万a(one)million1,

000,000twomillion2,000,000········以此类推······8,000,000eightmillion练一练345100118,657,421threehundredandforty-fiveonethousa

nd(and)oneeighteenmillion,sixhundredandfifty-seventhousand,fourhundredandtwenty-one1.Theprojectlasted5yearsandcost2billiondollars.2.T

heChinesehavebeenmakingpaperfortwothousandyears.3.Onethousandpoundsisalotofmoney.表示确定数量时用基数词+hundred，thousand，million，billion多位基数词读法457890608389th

reehundredandeighty-ninefourhundredandfifty-seveneighthundredandninetysixhundredandeight1）101~999的三位数由“百位数＋and+两位数组成”。如：325—threehund

redandtwenty-five102onehundredandtwo635sixhundredandthirty-five2)三位数以上的数，从个位往前数，每三位数加一个逗号，从后往前数的第一个逗号代表thou

sand,第二个逗号代表million,第三个逗号是billion，注意这几个词不能用复数形式，后也不能加and。例如：2,648twothousand,sixhundredandforty-eight16,250,064sixteenmill

ion,twohundredandfiftythousand,sixty-four确切数目与不确切数目的表达：hundred,thousand,million,billion等前面有基数词，表示确切数目时，用单数，后直接接复数名词；如：

threehundredbooksonehundredpeoplefivethousandstudentssevenmillionstarts表示不确切数目时，这类词后加-s且与of连用。如：hund

redsofpeoplethousandsofstudentsmillionsofbirdsbillionsoflions注意：这类短语中，名词前如有定冠词、指示代词或形容词性物主代词时，可加of,但

表示的是范围。如：twohundredoftheworkers工人中的二百（人）GrammarFocus(二)形容词的比较级和最高级comparativesandsuperlativeswithadj.andadv.short-shortersmall-smalle

rnicenicersafesafer------bigthinheavyheavierhappyhappierbigbiggerthinthinnerdelicious–moredeliciousinteresting–morei

nterestingimportant—moreimportantcarefully---morecarefullyquickly---morequicklyslowly---moreslowlyeasily---moreeasily大多数形容词和副词有三个等级：原级、比较级、最高级。一、形容词比

较级的构成1.构成的不规则变化:2.构成的规则变化:1.构成的不规则变化:e.g.good/well–better–bestbad/badly–worse–worstmany/much–more–mostlittle–less–leastfar–fa

rther/further–farthest/furthest2.构成的规则变化:1)单音节词和少数双音节词一般在词尾后加-er构成比较级或-est构成最高级.如：原级比较级最高级cold–——colder–——coldestbright———br

ighter———brightestyoung——younger——youngest2)以字母e结尾的词只加–r或-st构成比较级和最高级。原级比较级最高级nice———nicer–———nicestfine———finer————fin

estlarge——larger————largest3)重读闭音节词末尾只有一个辅音字母时,先双写这个辅音字母,再加-er或-est。如:big–bigger–biggestthin–thinner–thinnest4)以“辅音字母+y”结尾的双音节词，先改y为i,再加-

er或-est。如：easy–easier–easiesthappy–happier–happiest5)多音节词和部分双音节词在词前加more或most。如：delicious–moredelicious–mostdeliciou

sinteresting–moreinteresting–mostinterestingimportant—moreimportant—mostimportantcarefully---morecare

fully--mostcarefullyquickly---morequickly---mostquicklyslowly---moreslowly---mostslowlyeasily---moreeasily---mo

steasily形容词最高级的构成A:tallshortquickthicklightcoolwarmquietwildcalmthe--esttalltallertallestB:heavyeasytidydrybusyhappyheal

thyhungryearlyy--i--estC:largelatenice--stbiggestD:bighothottestthin“双写”thinnestwetwettestfatfattestAdjectivedeliciousdangerousinterestingpopu

larbeautifulcarefulfriendlythemost--adj.Adjectivebetterbestfarlittleworseworstmoremostfartherfarthestlesslea

stgoodwellbadbadlymanymuch1.good2.comfortable3.big4.happy5.cheap6.many7.difficult8.littlebetterbestmorecomfortablemostcomfortablebiggerbigges

thappierhappiestcheapercheapestmoremostmoredifficultmostdifficultlessleast1.用法：英语中三者或三者以上相比较，表示“最……”这样的最高程度概念时，要用“the+最高级”的结构表示。这种句式一般带有

表示比较的介词短语，比如:inourclass,ofthethree等。例如：WangLinisthetallestinourclass.Thistheateristhecheapestofthethree.注意使用最高级时应注意以下几点：形容

词的最高级(1)表示“最……之一”的句式，要用oneofthe+形容词最高级+复数名词。例如:JingjiangHotelisoneofthebiggesthotelsinourcity.Lisaisnotoneofmybestfri

ends.(2)当最高级前面有物主代词或名词所有格时，不加定冠词the。例如：TomisLucy’sbestfriend.Tuesdayisherbusiestday.(3)最高级前可加序数词。例如：TheYellowRiveristhesecondlongest

riverinChina.(4)形容最高级修饰作表语或介词宾语的名词，代词时，被修饰的词往往省略。例如：Heisthelaziest(student)inourclass.2.形容词比较级和最高级的构成(1)规则变化a.一般情况下

，单音节或双音节的形容词比较级直接加-er,最高级直接加-est。如：clever—cleverer—cleverestcheap—cheaper—cheapestfew—fewer—fewestsmall—smaller—smallestyoung—young

er—youngestb.以-e结尾的形容词，比较级+-r,最高级+-st。如：large—larger—largestnice—nicer—nicestcute—cuter—cutestc.以辅音字母+y结尾的形容词，变y为i+er

或+est。busy—busier—busiestheavy—heavier—heaviesteasy—easier—easiesthappy—happier—happiestdirty—dirtier—dirtiestd.以重读

闭音节结尾，末尾只有一个辅音字母结尾的词，双写最后一个辅音字母，再加+er或+est。如：big—bigger—biggestthin—thinner—thinnestfat—fatter—fattesthot—hotter—ho

tteste.多音节和部分双音节形容词，需在原级前+more构成比较级，+most构成最高级。如：important—moreimportant—mostimportantbeautiful—morebeautiful–mostbeautifuldif

ficult—moredifficult—mostdifficult3.不规则变化：原级比较级最高级good/wellbetterbestbad/illworseworstlittlelessleastmany/muchmoremostfarfarther/furth

erfarthest/furthestoldolder/elderoldest/eldest最高级规则变化口诀：最高级，很容易，一般词尾加est。(cheap-thecheapest)词尾若有哑音e,直接就加st。(close-theclosest)重读闭音节,单辅音字母要

双写。(big-thebiggest)辅音字母加y,记得把y变为i。(friendly-thefriendliest)多音节，考考你，themost到底加哪里？(popular-themostpopular)1.WearegoingtotheGreenRestaura

ntforlunch.(就划线部分提问)____________yougoingforlunch?2.Samistheshortestinhisclass.(改为同义句)Samis________than____

_____studentinhisclass.Samis_______than__________studentsinhisclass.Samis_______than______________inhisclass

.3.HowdoyoulikeScreenCity?(改为同义句)_______doyou__________ScreenCity?WhereareshorteranyotherWhatthinkofshortertheotheranyoneelseshorter练习：改写句子The

ComparativeSuperlativeDegreesofAdjectives&Adverbs总结形容词和副词比较级和最高级latelater-latestearlyearlier–earliestbigbigger-biggest

fluently/difficultmore～,most～重读闭音节、末尾只有一个辅音字母双写加–er或–est单音节词在词尾比较级加-er或最高级加-est以e结尾的词，只需加－r或－st以辅音字母加y结尾双音节词变y为i加–

er或–est部分双音节和多音节词在原级前加more或most少数以er,ow结尾的双音节词加-er-esttalltaller-tallestclevercleverer-cleverestcheap,cold,small,warm,young,highfine,nice,safehap

py,busy,dirty,easy,lazy,prettyfat,hot,red,thin,wet,sadnarrow,yellowquickly,slowly,useful,careful,popular,modern,形容词和副词比较级和最高级构成(规

则变化)不规则变化good/well–better-bestmuch/many–more-mostbad/badly/ill–worse–worstlittle–less–leastfar–farther/further–farthe

st–furthestold–older/elder–oldest/eldest形容词和副词比较级的用法1.Whorunsfaster,heorshe?2.Herunsfasterthanshe.3.Herunsmuchfasterthanshe.4.Hebeco

meshealthierandhealthier.5.Themoreyouexercise,thehealthieryouwillbe.6.Sheislesshealthythanhe.1.表示两者之间的选择,

可用“Which/Who…+比较，…or…?”.2.表示两者之间的比较，通常用连词than引导，表示“更······一些”．3.much/far/alot,even,still,alittle/abit…修饰比较级,表示程度.Whorunsfaste

r,heorshe?Herunsfasterthanshe.Herunsmuchfasterthanshe.4.“比较级+and+比较级”表示“越来越……”5.“the+比较级,the+比较级”表示“越…,越…”6.表示不及另一方时，用“less+原级+t

han…”(双音节和多音节词)Hebecomeshealthierandhealthier.Themoreyouexercise,thehealthieryouwillbe.Sheislesshealthythanhe.Heishealthierthanshe.Shangh

aiisbecomingmoreandmoremodern.1.比较级+and+比较级越来越…2.the+比较级,the+比较级越…,越…3._______________youare,_________mistakesyouwillmake.(你越仔细，做错的题

目就越少）4.__________youeat,_________you’llbe.(你吃得越多,就越胖)5.Alicewriteswell.Marywrites_________________thanshe.(甚至更好）ThemorecarefulthefewerThe

morethefatter1.Thegirlbecomes______________________.(越来越漂亮）moreandmorebeautiful2.Theweatherisgetting_____

____________.(越来越槽糕）worseandworseeven/stillbetter1.表示三者或三者以上比较,可用”Which/Who…+最高级,…,…or…?”表示.2.最高级+of/among(同类比较)in…(范围比较)4.oneof+形容词最高级+名词复数

表示“最…之一”3.序数词修饰最高级形容词和副词的最高级的用法Whoisthetallest,Tom,Mike,orJack?Tomisthetallestofthethree.Mikeisthesecondtalleststudenti

nourclass.Jackisoneofthetalleststudentsinourclass.Tomruns(the)fastestinourclass.3.LinTaois__________________________intheclassbecausehen

evergetstoschoolontime.（最懒的学生之一）4.Edisonwas_________________________intheworld.(最伟大的发明家之一）oneofthelazieststudentsoneofthegreatestinve

ntors1.TheYangtzeRiveris__________________riverintheworld.(第三长河）thethirdlongest2.TheAtlanticis______________

____oceanintheworld.(第二大洋）thesecondbiggestExercise:一、翻译句子：二、同义句转换1.FlatAismoreexpensivethanFlatBFlatBis_

______________thanFlatA.FlatBis_______________FlatA.FlatBisnot_________________FlatA.2.IprefermathstoEnglish.Ilikemaths_____________

_____English.betterthan3.Heisthetalleststudentintheclass.Heis______________________________intheclass.tallerth

ananyotherstudentanyother+名词单数lessexpensivecheaperthanasexpensiveas1.HainanisaverylargeIsland.Itisthesecond_________islandinchin

a.(large)2.Ourteacherisas______asbefore.(busy).3.Heis______________amongus.(careful)4.LiLeijumpedfar______thanJim.(far)5.T

hebusierheis,the________hefeels.(happy)6.IthinkYaoMingisoneof____________basketballplayersinNBA.(hot)busythem

ostcarefulfartherhappierlargestthehottest三、完成句子HomeworkPracticewithyourclassmatestospeakandwritelargenumbers.Write

somenumbercarsandputtheminyourroom.Wheneveryousee,readthemquickly.